74126120
Dec 24, 1990
Jan 28, 1992
radio frequency line tracers, audio frequency line tracers, pipe and cable locators, multifrequency pipe and cable locators, leak location and detection instruments, power line detectors, fiber optic power meters, fiber optic inspection microscopes, fiber optic test kits, comprising an optical power meter, fiber optic source, and fiber optic connectors and adapters; fiber optic cable fault locators, fiber optics laser sources, fiber optic cable locating systems, comprising signal transmitters, signal receivers and indicators; valve box locators, iron and steel locators, hand-held electronic amplification leak detectors, digital resistance cable fault locators, hand-held inductive probes, electromagnetic transmitters, hand-held underwater locators, sheath fault locators, fiber optic intercoms, and time domain reflectometers
Electrical and Scientific Apparatus